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dnl #
dnl # 3.6 API change
dnl #
AC_DEFUN([ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA], [
AC_MSG_CHECKING([whether dops->d_revalidate() takes struct nameidata])
ZFS_LINUX_TRY_COMPILE([
#include <linux/dcache.h>
#include <linux/sched.h>
int revalidate (struct dentry *dentry,
struct nameidata *nidata) { return 0; }
static const struct dentry_operations
dops __attribute__ ((unused)) = {
.d_revalidate = revalidate,
};
],[
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_D_REVALIDATE_NAMEIDATA, 1,
[dops->d_revalidate() operation takes nameidata])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.30 API change
dnl # The 'struct dentry_operations' was constified in the dentry structure.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS], [
AC_MSG_CHECKING([whether dentry uses const struct dentry_operations])
ZFS_LINUX_TRY_COMPILE([
#include <linux/dcache.h>
const struct dentry_operations test_d_op = {
.d_revalidate = NULL,
};
],[
struct dentry d __attribute__ ((unused));
d.d_op = &test_d_op;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_CONST_DENTRY_OPERATIONS, 1,
[dentry uses const struct dentry_operations])
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.38 API change
dnl # Added d_set_d_op() helper function.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_D_SET_D_OP],
[AC_MSG_CHECKING([whether d_set_d_op() is available])
ZFS_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/dcache.h>
], [
d_set_d_op(NULL, NULL);
], [d_set_d_op], [fs/dcache.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_D_SET_D_OP, 1,
[d_set_d_op() is available])
], [
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 2.6.38 API change
dnl # Added sb->s_d_op default dentry_operations member
dnl #
AC_DEFUN([ZFS_AC_KERNEL_S_D_OP],
[AC_MSG_CHECKING([whether super_block has s_d_op])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct super_block sb __attribute__ ((unused));
sb.s_d_op = NULL;
], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_S_D_OP, 1, [struct super_block has s_d_op])
], [
AC_MSG_RESULT(no)
])
])
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